* {
  padding: 0;
  margin: 0;
}
h4,
p {
  text-align: center;
}
h4 {
  font-size: 0.4rem;
  margin: 1rem 0;
}
.title {
  width: 2rem;
  margin: 0 auto;
  color: #fff;
  font-size: 0.26rem;
  padding: 0.1rem 0;
  background-color: #ff7e28;
  border-radius: 0.2rem 0.2rem 0 0;
}
.section-one {
  width: 80%;
  margin: 0.5rem auto;
}
.section-one p {
  font-size: 0.26rem;
}
.section-one p:last-of-type {
  margin: 0 auto;
  padding: 0.5rem;
  text-indent: 0.6rem;
  text-align: left;
  line-height: 0.5rem;
  color: #333;
  border-top: 1px solid #ff7e28;
}
.section-two > div {
  width: 80%;
  margin: 0 auto;
  border-top: 1px solid #ff7e28;
}
.section-two > div .head-pic {
  width: 1.6rem;
  height: 1.6rem;
  margin: 0.4rem auto;
  border-radius: 50%;
  overflow: hidden;
}
.section-two > div .head-pic img {
  width: 100%;
}
.section-two > div h4 {
  padding: 0;
  margin: 0;
  font-size: 0.26rem;
  font-weight: 500;
}
.section-two > div p {
  color: #666;
  font-size: 0.26rem;
  line-height: 0.5rem;
}
.section-three {
  width: 80%;
  margin: 0.5rem auto;
}
.section-three video {
  width: 100%;
}
.section-four > div {
  display: flex;
  padding: 0.2rem;
  font-size: 0.26rem;
  text-align: center;
  background-color: #fff;
  box-shadow: 0 0.01rem 0.04rem #ccc;
}
.section-four > div span {
  flex: 1;
}
.section-four ul {
  padding-top: 0.2rem;
}
.section-four ul li {
  width: 90%;
  margin: 0 auto;
  padding: 0.1rem 0 0;
  display: flex;
}
.section-four ul li .course-pic {
  flex: 1;
  display: inline-block;
  width: 2.4rem;
  border-radius: 0.1rem;
}
.section-four ul li .course-pic img {
  width: 100%;
  border-radius: 0.1rem;
}
.section-four ul li .text-info {
  flex: 2;
  font-size: 0.26rem;
  margin-left: 0.2rem;
}
.section-four ul li .text-info .top {
  display: flex;
}
.section-four ul li .text-info .top span {
  flex: 1;
}
.section-four ul li .text-info .top span:first-of-type {
  width: 3rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.section-four ul li .text-info .top span:last-of-type {
  display: inline-block;
  text-align: right;
  color: #444;
}
.section-four ul li .text-info .top span:last-of-type img {
  width: 0.4rem;
  vertical-align: -22%;
}
.section-four ul li .text-info .bottom {
  margin-top: 0.36rem;
  color: #666;
}
